Process for producing on the fibers new copper compounds of substantive orthooxyazo dyestuff.



A I ,1. PATENT OFFIQ.

EUGEN ANDERWERT, HERMANN FRITZSCHE, ANL HEINRICH SCHOIBEL, OF BASEL;

SWITZERLAND, ASSIG-NORS ro socIn'rY BASEL, SWITZERLAND.

rnoonss non. PRODUCING on THE rrnn'ns nnw corrnn ooMPounns orsuBs'rAn'rI'yn OF CHEMICAL INDUSTRY IN IBASLE, 01

- OBTHOOXYAZO DYESTUFF.

No Drawing.

To all whom it may concern:

Be it known that we, EUGEN ANDERWFJRT, chemist, a citizen of the SwissRepublic, HERMANN FRrrzscHE, chemist, a citizen of the Swiss Republic,and HEINRICH ScHoBEL, chemist, a citizen of the Swiss Republic, allresidents of Basel, Switzerland, have invented a Process for Producingon the Fibers New Copper Compounds of Substantive Orthooxyazo Dyestufls,of which the following is a full, clear, and exact specification.

In our application for a U. S. Letters Patent, Ser. No. 59580, filedNovember 4, 1915,-

. we have described the production of new 1917, subsequently On thefiber with copper copper compounds of substantive orthooxyazo dyestuffs,which can be fixed like the known substantive dyestuffs without moredant on the various textile fibers, yielding hereby tints of excellentfastness to light, washing and alkali.

We have now found that the copper compounds of the same orthooxyazodyestufi's can also be produced on the fibers, by treating for instancethe dyeings obtained directly on the fiber with the substantlveorthooxyazo dyestuffs described in the applications for United StatesLetters Patent Ser. No. 144244, filed January 24, 1917 (divisionalapplication of Ser. No. 54403),'Ser. No. 144243, fi led January 24, 1917(divisional application of Ser. No. 54403), Ser. No. 54513, filedOctober 7, 1915, Ser. No. 1647 95', filed April 26, 1917 (divisionalapplication of Ser. No. 545-13) and in the U. S. Letters Patent No.1210751, dated January salts or by dyeing the fiber with the saidorthooxyazo dyestufls in a bath containing copper salts.

The new process is illustrated by thefollowing examples:

Example 1 The monoazo dyestufi' prepared from orthodiazoparacresolfonicacid and is dyed in the manner usually employed for substantivedyestuifs with 5 to 40% cryst allized sodium sulfate and 1 to 5%sodlum'car- Specification of Letters Pateut.

bonate, the goods being introduced into the dyeing bath at a temperatureof-4050 C., the bath heated to boiling and niaintained in ebullition forito 1 hour. The dyeing ob- Patented Aug. 20, 1918 Application filedNovember 4, 1915. Serial No. 59,579..

The resulting tint is identical with that obtained by dyeing with thecopper. compound of the same dyestufi' without subsequent treatment. 7

Example 2: The monoazo dyestufi resultmg from 4: 2: l-nitrodiazophenoland is dyed in the manner employed for substantlve dyestuffs in a bathcontaining 1% crystallized copper sulfate, 20% sodium sulfate and 2%calcined soda,

the goods being introduced into this bath at a temperature of 40-50 C.and the bath heated to ebullition for to 1 hour. Hereafter the goods arerinsed and dried. The obtained dyeing is identical with that obtainedwith the copper salt of the same monoazo dyestuff.

-In an analogous manner can be produced on the fiber the variousothercopper com- 1 pounds of orthooxyazo dyestufis described in ourapplication for aU. S. Letters Patent Serial No. 59580, filed November4, 1915.

dyestufi derived from a 2: 5:7-aminonaphthol sulfonic compound.

2. The described process for producing I fast tints; on animal orvegetable goods,

which consists in first dyeing the goods in a 1915, in the presence oftwo subscribing Witbath formed by a solution of a substantive messes.

orthooxyazodyestufi derived from a 2: 527- EUGEN ANDERWVERT.aminonaphtholsul'fonic compound and treat- DR. HERMANN FRITZSCHE. ingafterward the thus obtained dyeing with DB. HEINRICH SCHQBEL.

a solution of a copper salt. Witnesses:

In wltness whereof We have hereunto ARNoLo ZUBER, slgned our names thls6th day of October, Ammo R1.

